Filter



Filed April 12, 1946 s Sheets-Sheet 1 Jan.'2, 1951- c, MlLLER 2,536,690

FILTER (1% 4 I m z swazr C. H. MILLER Jan; 2, 1951 FILTER 3 Sheets-Sheet 2 Filed April 12, 1946 .INVENTOR. CVYarZeSJZJV/Z' Z 7-2 7" Jan. 2, 1951 c. H. MILLER 2,536,690

FILTER Filed April 12, 1946 3 Sheets-Sheet 3 as 8 3( F w a A5 I 25 INVENTOR.

Patented Jan. 2, 1951 OFFICE FILTER Charles H. Miller, Chicago, Ill. Application April 12, 1946, Serial No. 661,646

3 Claims. (Cl. 210-178) This invention relates to filters and has for its object to provide a filter having a very large filtering capacity in proportion to its size and constructed in such manner that it may be kept in clean and operative condition with a minimum of labor and loss of time.

Further objects of the invention will be more specifically set forth in the detailed description which follows.

In the accompanying drawings:

Figure l is a front elevation of a filter constructed in accordance with the invention;

. Figure 2 is a vertical sectional view of the filter casing with the internal operating parts shown partly in elevation and partly in section; with the screens and filter paper omitted.

.Figure 3 is a detailed view of a post or pedestal by .which the filter elements are tied together;

Figure 4 is a plan view of the structure of Figure 3;

Figure 5 is a plan view of the disk of one of the double filtering elements; 4

Figure 6 is a plan view of one of thefiltering screens which lies upon the side of the filtering disk of Figure 5, in making up a filter element;

Figure 7 is a plan view of one of the spacer disks by which the filtering elements of Figures 5 and The filter casing is indicated at 5, in Figures 1 and 2. A yoke 6 and clamping screw 1 provide means for clamping a cover 8 upon the casing,

This cover may be provided with a pressure release valve 9. The casing may be provided with any suitable stand I and the outlet valve for the water is indicated at H.

A gasket I2 is provided between the cover 6 and the casing to form a fluid-tight joint. The filter element proper is mounted inside of the casing and its bottom assembly plate I3 is caused to make fluid-tight engagement with the bottom M of the casing through the medium of a gasket I5. The inlet for the water into the casing 5 is indicated at I6, and the presence of the gasket l5 or core assembly, presently to be described. will be understood that the valve is connected to the outlet H. The core assembly as a whole is pressed upon the gasket l5 by a spring l8, said spring bearing between the head 8 of the casing and a clamping nut l9. This clamping nut engages the threaded portion 20 of the post or ped- I estal 2| of Figure 3. The lower portion of this pedestal is provided with a threaded extension 24 which screws into the bottom assembly plate l3. Mounted upon pedestal 2| are the filtering ele-. ments and the spacing members which lie be-x tween the filtering elements.

screens in place. When the screens are snapped? into place as described they are supported by the: upstanding bosses 21. These several elements, to wit: the disks, the screens, and the filter paper together constitute a filtering unit and these units have central openings 30 through which the pedestal 2| passes. Disposed between the several filtering units are the water inlet spacer disks; 3| illustrated in Figure 7. These disks com-- prise the peripheral flanges 32 which are pierced V at intervals as indicated at 33 to permit water to pass through the water inlets or openings 33, into the openings 34 of the spacer disks, which openings of course lie between the filter units. Thusthe passage of water is from l6 through 33 to 34, thence through the filter paper and screens of the filter disks 25. Some of the water passes through horizontal openings 35 to the central openings 36 of the filter units, and thence downwardly along. 7 the pedestal to the bottom of the filter (due to the fact that the pedestal is not circular in cross section and does not fill the central openings of the several filter units and spacing disks) Water also passes directly downward through the filter- I ing units or elements through the openings 26,

26a, reaching the bottom of the casing 5 through openings 46. wardly around the pedestal passes through the transverse ports 36 into the space 31 constituting the hollow underside of assembly plate l3 beneath the filter assembly. By referring to These disks have the openings 26, 26a

The water which passes down- 2 it will be seen that the bottom assembly plate I3 is of inverted cup shape, the openings 40 being formed through the top of this assembly plate.

As stated the threaded extension 24 of the pedestal 2| screws into a part which is a portion of the bottom assembly plate. Also the port 36 is formed in this bottom assembly plate I3. Thus the filtrate which descends vertically through the openings 40. in the. top of assembly. plate .13 into. the spacegsfiand thence, to H, while the filtrat'ea which passes through openings 35 (Fig. 9) and thence downwardly along the pedestal, finds its... way to space 3'? and outlet I! through the port 36 of the bottom assembly plate l3. By tighten-e ing down on clamping unit IS the several filter..-

ing and spacing elements are drawn tightlytogether between the bottom assembly; plate. l8: and clamping disk 38. From there it passes to the water outlet ll. This double path for the' water increases the filtering capacity far beyond any filteroffwhich- I have knowledge and' 'is so efi'icientithatea. filter 'of comparatively small size will filter close-to. three thousand gallons per hour;

One: of the filter" paper and screen assemblies; 29,-" 28-7overliesaopenings 40 of the bottom assemblyr plat'eelii;

Erom' the foregoing it: will be seen that not only: does the described. arrangement'of the filter paper; filter. screens and' filter di'sk s; in -large number,- provide means forzfiltering a -large quantity ofiwater rapidly, but th'e describ ed assembly is such that by merely:releasinglthescrew l and removing: the= cap 8; the whole fiiter" assembly maybe-lifted "out of the casing fi anda clean one substituted, in an exceedingly short time: Thus no: interruption of service is" occasioned and the' filtering process may-proceed without "substantial-'- interruption;

The function of the clamping unit I 9is tobind all" of thefilter unitsand the spacer disks into firm and water-tight-engagementwitheach-otherandupon the pedestal'il. When this clamp I9 is tightened itforces ax-stoutclamping-disk 33 forciblyupon the topmost fi-lter unit: The presence Qfthe'fiIter-paper acts as'enough ofa pack-- ingtoinsure afluid-tight joint about theedges" of all of-the disks '2 and 32 thus in turn insur-- ing tl'iat no water may find-its way tooutlet IT except such as has been forced to *pass' through the-filter paper "and screens:

Itis to r be understood that the invention is ;not' limited to" the precise construction set forth but that: it includes within its purview" whatever changes fairly --come within -either" the termspi" the spirit of the appendedcla-ims:

Having described" my invention, what" I claim- 1st:

1;,A'filter of the character described compris' ing' acasinghaving' a bottom the. inner face of; which presents a plane :surface over those pertions:of the bottom; adjacent: thesid'e walls...of the casing a cover for saidcasing; means for.hold-' ing the-cover-upont the casing, a filterihgassem lily-"within the casing; comprising a bottom assembly-"plate, of inverted cup; formation whichprovides aspace in thebottorn of the filtering assembly, an annular compressi'blej gask'etmar= ried by the =lower face 'of-thetassembly"plateand beari'ng'uponthe plane bottom of said casingsaid' gasketproviding afinid tight barrier betweenthespace within the bottomof-"the filtering assembly andithe'space within the casing outside-"of 'saidi gasket; a water inlet'leading 'into rthezcasing and" water outlet in the bottom of the casing and communicating with the space in the bottom of the filtering assembly, a post that is polygonal in cross section, the lower end of said post being rigidly engaged with the central portion of the bottom assembly plate, a plurality of alternating filter disks and hollow spacing members having central circular openings through which the post passes, the. poly onal formation of the. post causing it-itoz present verticalilpassages alon'ggits sides, the spacing members having peripheral openings formed therein for the passage of water from the water inlet to the interiors of said spacing members, the filter disks carrying filtering medium upon... their opposite faces, and having ports formed therein which establish communication between;thezspacesrbetween the said screens of each filter disk and the vertical passages along the sides of the polygonal post, means having threaded engagement with the upper end of the post for binding: the filter: disks and spacing members-upon the bottom assembly:plate, and. pressureexerting: means between the cover and: the filtering assembly for forcing' the..annular.- gasket' into fiuid' tightengagement with thez bot-e" tom of the casing, the bottom.assemblyrplatebee ingprovided with ports leadingfromzzthezspace withinits underside to :the passages whichl'emend' 1 vertically alongside the polygonal posts..

2. A filter of thelcharacter'describedcomprising' a; casing having aLhottom-thesinner face: of

which presents a plane;-surfaceioverxthosez pors tions of the bottomadjacentthe sidekiwallsaof the casing; a cover" for saidtcasing: meansifor 35 holding: the cover uponttheacasing: azfilteri'ngj as.-'+-

sembly within the= casingfcomprising a1bottom.- assembly plate of inverted cup formation' which provides: a: space in the: bottom of the filtering;

assembly; an annular compressible gasketr car,-

" 4o" ried by the lower face of the assembly plate; and:

bearing upon the" plane=bottomof said casing, said gasket providing aifi'uid tight ibarrienbe' tween the space' Within th bottom' of the 'filteringassemblyand the space within-the casingout side of said gasket; a. Water inlet leading-into; thecasing and*into the-space Which lies outside of 'said gasket;- a water-outlet:inathe bottom of the casing and communicating w-ith the space in the bottom 'of tli'e filtering assembly, a post that is polygonal in cross-section, the lower'end of said post being rigidly engaged with the central portion of the bottom assembly plate; a plurality:

of' alternating-filter'disks and hollow-r spaci members having centralfciifcular openings thr 1- which the post passes;- the' polygonal formationof the post causing it to present'verticalpassages. along its-sides; the spacing-members "having peripheral openings formeditherein foi the passage of water from the water inlet to the interiors-of said spacing-members;- the filter "disks carrying fi1tering= medium. upon-their: opposite faces, and; havingposts formed therein which establish com I munication betweenlthe spaces between: the said screens of each filter disk and the verticalpasfsages along the sides of the polygonal post; means -1 plate being provided with portsleading' from thespace within-its underside to the=passageswhich ipto thespace-which-lies'outsi'de'ofsaid gasket; a; extend verticallyalongside the"p y "p fi= REFERENCES CITED The following references are of record in the file of this patent:

Num er 6 UNITED STATES PATENTS Name Date- Harris Dec. 11, 1883 Murphy Sept. 25, 1900 Klein June 26, 1906 Anderson Mar. 16, 1909 Taylor Apr. 17, 1917 Dumas Oct. 9, 1934 Crawford Oct. 16, 1934 Becker Oct. 5, 1943 Walton June 29, 1948 

